KR970055966A - Data strobe signal generator for the assigned timeslot of personal communication terminal - Google Patents

Abstract

The present invention is to generate a strobe signal for a corresponding time slot based on a frame start signal transmitted from a base station and a time slot number allowed for use in a personal communication device such as a portable telephone. The present invention relates to a data strobe signal generator for an allocated time slot of a personal communication terminal, wherein each data bit has a length of 48 clocks based on a clock of 13 MHz, and a single time slot is formed of 156.25 bits. A communication system comprising: clock generating means for generating a reference clock of 13 MHz; a bit synchronous signal generating means for generating a bit synchronous signal based on the reference clock and a frame start signal, and a time based on the bit synchronous signal and the reference clock. A time slot synchronizing signal generating means for generating a slot synchronizing signal; A time slot number counting means for outputting a current time slot number, a latch means for storing a time slot number set from the outside, a time slot number counted by the time slot number counting means and a time registered by the latch means Comparison means for comparing a slot number and outputting a clock signal corresponding to a period in which both data coincide; a 148-bit signal generator for counting 148 bit synchronization signals and outputting a 148-bit signal; and a clock signal from the comparison means And a data strobe signal output means for outputting a predetermined level signal for a time period from the time point at which the 148-bit signal generator to the time point at which the 148-bit signal is output.

Description

Data strobe signal generator for the assigned timeslot of personal communication terminal

Since this is an open matter, no full text was included.

3 is a circuit diagram showing the configuration of a data strobe signal generator for an assigned time slot of a personal communication terminal according to an embodiment of the present invention.

Claims (1)

In a personal communication system in which each data bit has a length of 48 clocks based on a 13 MHｚ clock, and one time slot is formed of 156.25 bits, the effective data bit number of a random access channel is set to 88 bits. Clock generating means for generating a reference clock of the signal, bit synchronization signal generating means for generating a bit synchronization signal based on the reference clock and the frame start signal, and generating a time slot synchronization signal based on the bit synchronization signal and the reference clock. A time slot synchronous signal generating means, a time slot number counting means for counting the time slot synchronous signal and outputting a current time slot number, a latch means for storing a time slot number set from the outside, and counting by the time slot number counting means A period in which both data coincide by comparing the time slot number registered with the time slot number registered by the latch means. A comparison means for outputting a corresponding clock signal, an 88-bit signal generator for counting 88 bit synchronization signals and outputting an 88-bit signal, and from the time point at which the clock signal is output from the comparison means, from the 88-bit signal generator; And a data strobe signal output means for outputting a predetermined level signal for a time period up to the time point at which the 88-bit signal is outputted. ※ Note: The disclosure is based on the initial application.